[Buildroot] MIPS arch on NPTL branch

[Carmelo AMOROSO]

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James Chapman wrote:
> Carmelo AMOROSO wrote:
>> James Chapman wrote:
>>> Carmelo AMOROSO wrote:
>>>> James Chapman wrote:
>>>>> Carmelo Amoroso wrote:
>>>>>> Bernhard Reutner-Fischer wrote:
>>>>>>> [James, wrong list, redirecting accordingly]
>>>>>>>
>>>>>>> On Mon, Mar 02, 2009 at 10:27:25PM +0000, James Chapman wrote:
>>>>>>>> Just wondering what the status of the MIPS arch is on the uclibc-NPTL
>>>>>>>> branch tip.  I'm seeing compile errors because _dl_find_hash() now has
>>>>>>>> an extra argument. Is MIPS missing an update after generic ldso changes?
>>>>>> I think so
>>>>>>>> Perhaps someone is already working on this?
>>>>>> I don't think so. The patch may be trivial. If you are able to test,
>>>>>> please post the teste patch.
>>>>> Unfortunately, adding NULL values to the _dl_find_hash() calls as done
>>>>> in the attached patch doesn't produce useful executables.
>>>> I did mean trivial == pass NULL.
>>>> In the NPTL case (more correctly TLS case) it needs to pass, in some
>>>> case the exta parameter that will hold the pointer to the tpnt where
>>>> the TLS symbol has been found.
>>>>
>>>> Give me some time to check/fix your patch. I don't have any mips box
>>>> anyway to test... I'll kindly ask you to do this.
>>> Ok. I'll be happy to test.
>>
>> James,
>> I looked at the mips specific part of ld.so and I realised that there in
>> *nothing* for handling TLS relocations. Probably Steve, who originally
>> started working on TLS/NPTL port for mips, has never released his mips work.
>> So, in one word, TLS support on NPTL branch is only available (and
>> working) for ARM and SH4, that's my understanding.
> 
> Hmmm. MIPS/NPTL was working with TLS on the NPTL branch back in April
> 2007. My understanding is that all the work done by Steve was committed
> to svn back then. It seems to me that changes made since then broke
> MIPS. If no-one noticed until now, it's a pity.
> 
James,
sorry sorry sorry !!!!

you are perfectly right. I found that rev 24524 by Denys, completely
brake TLS support for MIPS !!!!!!!!!!!!!!!!!! removing all the code
related to TLS relocations.

I'll see if I can try to recover it back.

Steve, sorry if I had doubt on your work ;-)

Carmelo

>> The common code of ld.so (including TLS part) is working. So if you
>> volunteer your self for complete the work, welcome !.
> 
> If someone can give an overview of the changes that need to be made in
> this area, it would help. Unfortunately I'm unfamiliar with the guts of
> the uclibc NPTL implementation so I would need some pointers to get
> started.  :(
> 
> /james
> 
>> Carmelo.
>>
>>>> Cheers,
>>>> Carmelo
>>>>
>>>>
>>>>> Freeing unused kernel memory: 144k freed
>>>>> Kernel panic - not syncing: Attempted to kill init!
>>>>> /sbin/init: can't handle reloc type 0x2f
>>>>> What svn version is recommended for MIPS NPTL?
> 

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